Why is the airport tax at some airport charged outside the airfare ticket but instead must be paid at the airport? Example from Uyuni airport
libyan-citizens
tsa
american-airlines
flixtrain
submarines
georgian-language
volunteering
pre-clearance
westjet
antalya
romance
thailand
han
business-class
balkans
turkmenistan
wlg
thousand-islands
stonehenge
tropical-destinations
new-york-state
stavanger
space
thessaloniki
nbo
shinkansen
tgvair
jamaican-citizens
accessibility
indigenous-peoples